RE: RMAN backup slows database performance to a crawl
- From: "Allen, Brandon" <Brandon.Allen@xxxxxxxxxxx>
- To: <finn.oracledba@xxxxxxxxx>, "oracle-l" <oracle-l@xxxxxxxxxxxxx>
- Date: Thu, 10 Jul 2008 14:11:55 -0700
Doesn't sound like a bug to me - just sounds like you're saturating your
I/O subsystem, but you'd need to look at the throughput you're getting
and compare that to the expected throughput based on your disk config to
confirm if that's the case or not.
You might want to consider running backups at a time when other activity
is minimal and also consider implementing incremental backups with a
change tracking file to prevent RMAN from having to scan the entire
database for changed blocks. This fairly simple change can easily
reduce backup runtimes from hours to minutes.
Regards,
Brandon
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